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Articles by Saidi Noureddine
Total Records ( 2 ) for Saidi Noureddine
  Zergui Amina , Saidi Noureddine , Arul Venkatesan , Venkatesh Perumal , Bessaiah Hichem , Zergui Asma , Merzouk Yamina , Heddadji Miloud and Kihal Mebrouk
  Lactic acid bacteria have long been considered safe and suitable for human consumption when administered in adequate amounts. The aim of this study is to investigate the probiotic properties of Lactobacillus plantarum DU10 isolated from Algerian raw camel milk. The analysis of haemolytic and gelatinase activity, bile tolerance, cholesterol lowering capacity, acid resistance, exopolysaccharide and biomolecule production were established. The results revealed normal growth of Lactobacillus plantarum in the presence of bile salt concentrations, gastric and intestinal fluid. This strain was able to reduce cholesterol and the majority of cells were viable at pH 2.0 even after 24 h of incubation and can produce exopolysaccharides and antimicrobial compounds. No gelatinase and haemolytic activity was detected. Natural resistance to some antibiotics was observed. According to these results, this probiotic strain could be proposed as adjunct culture and exploited for food manufacture as a biocontrol agent.
  Zergui Amina , Saidi Noureddine , Arul Venkatesan , Bessaiah Hicham , Benmalek Yamina , Bouayad Leila and Kihal Mebrouk
  The aim of this study was the partial characterization of plantaricin MZ, a two-component antimicrobial peptides produced by the putative probiotic bacteria Lactobacillus plantarum DU10, which was isolated from Algerian raw camel milk. This biomolecule was secreted in the supernatant of a L. plantarum DU10 culture and showed diverse spectrum of antimicrobial activities against several pathogenic bacteria. The activity as determined by the proteolytic action of trypsin, pepsin and proteinase K, plantaricin MZ was maintained even after a treatment at 121°C for 15°C and a pH range from 2-10. This putative probiotic strain was found to produce antimicrobial substances proteinaceous in nature. Molecular mass determination was estimated with tricine-sodium dodecyl sulphate-polyacrylamide gel electrophoresis, then confirmed by mass-assisted laser desorption ionization time of flight mass spectrometry. The producing strain and its antimicrobial peptides may find an application as a bio-preservative agent.
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